A compression artifact is the fuzz or distortion in a compressed image or even sequence of video images. When a photograph is compressed in to a JPEG format, few data is dropped, which is why this compression is known as lossy compression. Compression artifact occur in numerous common media including DVDs, common computer file formats including JPEG, MP3, or even MPEG files, and many alternatives to the compact disk, such as Sony’s MiniDisc data format.